Used as a chiral Brønsted acid organocatalyst in asymmetric synthesis, enabling high enantioselectivity in reactions such as cyanosilylation, Mannich-type reactions, and other carbon-carbon bond formations. Its bulky, well-defined chiral structure derived from substituted BINOL provides effective steric and electronic control for stereoselective transformations, particularly in pharmaceutical and fine chemical manufacturing. Commonly applied in the synthesis of enantiopure compounds where precise stereochemistry is critical, without requiring transition metals.